Vocabulary:

-Variables and expressions:
  • Variable- is a letter that represents a value that can change or vary.
  • Coefficient- is the number multiplied by the variable.
  • Algebraic expression- has one or more variables.
  • Constant- means it does not change.
  • Evaluate- to find the value of a numerical or algebraic expression.
  • Substitute- to replace a variable with a number or another expression in an algebraic expression.